Finding the Third Proportional to 143,016 and 314,039

Step by Step Solution

1. Step 1: Write the proportion equation
   143,016 : 314,039 = 314,039 : x
2. Step 2: Convert to fraction form
   143,016/314,039 = 314,039/x
3. Step 3: Cross multiply
   143,016x = 314,039 × 314,039
4. Step 4: Simplify right side
   143,016x = 98,620,493,521
5. Step 5: Solve for x
   x = 98,620,493,521/143,016
6. Step 6: Final answer
   x = 689,576.65